Horizontal convex envelope in the Heisenberg group and applications to sub-elliptic equations Article Sidebar Requires Subscription Download Article PDF Download Article Abstract PDF Submitted: Jul 2, 2019 Accepted: Sep 16, 2020 Published: Dec 22, 2021 DOI: https://doi.org/10.2422/2036-2145.201907_001 Issue 2021: VOL. XXII, ISSUE 4 Section Article Main Article Content Qing Liu Xiaodan Zhou Abstract Article Details